Weighing scale



March 26, 1.929. H, HAPGQQD 1,706,976

WEIGHING SCLE Filed March 22. 1922 2 Sheets-Sheet l gnvmafoz E- In:@MEE/arca f HAPon y Patented Mar. 26, 1929'.

CLARENCE H.

HAPGOOD, OF TOLEDO, OHIO, ASSIGNOR TO 'TOLEDOk SCALE COMPANY,

OF TOLEDO, OHIO, A CORPORATION OF NEW JERSEY.

WEIGHING SCALE. f

Application filed March 22, 1922. Serial No. 545,644.

This invention relates to weigliing scales and weighing methods, andparticularly to vmethods for filling to a predetermined weight packagesofV varying tare weights.

One of the principal objects of the invention is to provide meanswhereby containers of varying tare weight may be filled with a commodityto a predetermined weight, the contents being weighed in the container.v

Another object is to provide a scale in which containersr of varyingweight and their contents may be weighed without shifting the poises orotherwise adjusting counterbalancing mechanism. i

Other objects and advantages will be apparent from the followinglescription, 1n which reference .ishad to the a ,companyingdrawingsillustrating preferred embodiments of my invention and wherein similarreference numerals designate similar parts throughout the several views.

In the drawings n l E Figure 1 is an elevational view ot a weighingscale embodying my invention, part of the casing of the scalebeing'broke'n away; Figure 2 is'an. elevational View. of another form ofthe scale embodying my invention g' and y Figure Sis fragmentaryl viewof the indicating mechanism of the scale shown .in

A.Figure 21 with the indicator `in another position. Y

.Referring to the drawings in detail, the

base 1 of the scale is hollow and contains the platform lever mechanism(not shown) which supports the platform or commodityreceiver 2. Fixedupon the rear end of the base 1 is an upright housing or hollow column 3which supports at its upper end a substantially Watch-case-shapedhousing 4; that contains the automatic load-offsetting mechanism. Y

Within the housing 4t is a frame 5, upon the upright portions 6 of whichare supported fulcrum sectors 7 the fulcrum sectors being supported bymeans of llexible metallic bands or ribbons which overlie the outerparallel vertical faces of the uprights 6. The automaticcounterbalancing mechanism of the scale consists of a pair of oppositelyswinging pendulums 8 which are rigidly connected to their respectivefulcrum sectors 7. Pivotally connected to the fulcrum sectors 7 on anaxis passing through thc center vabout which the arcuate faces of thesectors are curved is a compensating frame 1() which moves vertically asthe pendulums` 8 swing outwardly, the frame 10 being suitablyconnectedtlnfough rack and pinion mechanism (not shown) to an indicator hand 11.c

Rig-idly connected to the respective pendulums 8 and t'ulcrum sectors 7are power sectors'12 from which depend a pair of metallic ribbons 13,the lower ends of the ribbons being connected'to an equalizer 14;, theequalizer l-fl being in turn connected through links 15 and 1G to theplatform vlever mechauism which is contained within the base l. The link16 is also connected by means of a pivot 17 to a lever 18 fulcrumed inther upper end of the column 3, and supported upon the` lever 18 bymeans of brackets 19 are weighing beams 20 and 21, the beam 20 carryinga comparatively heavy sliding poise 22, while the beam 21 carries alighter sliding poise 23.

A graduated chart 24 is located within the housing 4 and is visiblethrough a yglass window or crystal 25. In the form of device shown inFigure 1 the window extends over substantially the entire of the housing4, while in the form shown in Figures 2 and 3 the greater part of theface is covered by a plate 26n which contains an arcuate window 25through which the graduated portion only of the chart 24 is visible.

In the form ofthe device shown in Figure l the automatic load-offsettingmechanism isy visible to the operator. Owing to the much greater area ofexposed glass in this form of scale the Window 25 is, however, much more`likely to become broken than is the window 25a in the form shown inFigures 2 and 3. The mechanism in both forms of scale is the same. Inweighingpackages of commodities the usual procedure is first to placethe empty container on a scale and to counter-balance its weight bymeans of a sliding poise. A suilicient amount of the commodity to bepackagedis then placed in the container to bring an indicator to adelinite graduation or, if the scale being used is an automatic scale,to balance a counterpoise on another beam. In order to save time thecontainers are often weighed on a separate scale and the wei htsstenciled or otherwise marked upon tgliem. Approximately the requiredamount of the com modity may then be placed in each package belore it isweighed, as the scale operator can set his tare poise to the graduationon the beam corresponding to the Weight marked on the container.

vIn using applicants device, however, no manipulation Whatever of theWeights is necessary. Containers having the tare Weight .marked uponthem may be lilled with approximately the required amount of hecommodity before they are brought to the scale, or they may be filledwhile upon the scale. Figure 2 shows a nail keg l. on 'the platlirm olithe scale, the tare weight of the keg (i) lbs.) being marked upon it.The not Weight of the contents et' the keg lo() lbs. This net weightdoes not vary, but each keg contains the same number' of poum s ofnails. The tare weight ol the kegs does, however, vary s much as threeor `tour pounds. ln Weighing nails with the aid olf applicants inventionthe poise 22 is set at 100 lbs. and. its position on the beam is .leftunchanged. As each keg is pl accd. upon the scale the operator notes thetare Weight marked upon the keg and fills the keg to a Weight whichbrings the imlicator il to the corresponding griuluation on'lhe chart25% Since there is no manual manipulation oit poises the operation oisecuring proper and uniform net .veights is greatly facilitated.

Owing to the 'fact that the tare weight o'li the containers is usuallymuch less than the Weight of the contents, the automatic counterbalancingmechanism .may be made very sensitive and the graduations onthe chart siriaced widely apart. By the aid o't applicants invention thenet weights may, therefore, be obtained with a greater degree otaccuracy than is possible without the expenditure of much more time.

The beam 2l may be used in the comparatively rare instances When theWeight o't the container exceeds the capacity of the chart.

l have shown the beam 20 as provided Withnotchefe: and .markingscorrespomling to required nct weights. This beam niay, however, be plainand the poise may be set by the use of a test weight. It, for example,the required net weight ol' the con'imodity is l0() lbs., a 1U() lb.Weight may be placed upon the lplatform and the poise Q2 moved to aposition on vthe beam in which the indicator ll will stand at zero.

l'hile it will be apparent that the illustrated embodiments ol" myinvention herein disclosed are well calculated to adequately lfuliil theobjecs lrimarily stated, it is to be understood that the invention. issusceptible lo variation, modilication and change within the spirit andscope oit' the subjoined chiims.

Having described my invention, I claim:

l. In a de fice of the class described, in. combination, acommodity-receivcr, beam weighing mechant-an ot comparatively greatcapar y connected thereto and adapted Vto counimbalance net weights o'lpackaged commodities, and automatic weighing and indi cath j niecl :mismoit comparatively great saisitivencss connected to saidcommodityrecciver and adapted lo counter-balance and .indicate varying'lare weights of cimtainers :tor such commodities.

2. Vin a device ot the class described, .in combination, acommodity-rcceiver, beam Weighing mechanism oit comparatively greatcapacity connecled thereto and having markings corresponding to requireduct Weights ol" packaged commodities, und automatic weighing andindicating mechanism ol" comparatively sensitivi-.ness connected to saidcommodityu cciver and having mark ings correspomlmg to variole; tareweights oit cinilainersI lfor such commodities.

vClnliliilN "E H. HAPGOOD.

